Effect of formulation types on the efficacy of indoxacarb against cotton leafworm Spodoptera littoralis (Lepidoptera : Noctuidae)‎

Abstract EN

The primary objectives of formulation technology are to optimize the biological activity of the pesticide and to give a product which is safe for use.

The present study aimed to determine the more formulation type which had more the effect on the efficiency of indoxacarb against cotton leafworm Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae).

Three formulation types of Indoxacarb; emulsifiable concentrate (EC), suspension concentrate (SC) and water dispersible granule (WG) were prepared in four concentrations and evaluated against 3rd instar larvae of cotton leafworm S.

littoralis.

Also, the physicochemical properties of the spray solution of these formulation types were determined.

The results indicated that the EC was more formulation type effect on the efficiency of indoxacarb where the mortality percentage increased with it compared with other both formulation types.

Also the medium lethal concentration was less with EC compared with SC and WG.

The physicochemical properties of the spray solution illustrated that the values of surface tension and pH of ECwere less than SC and WG.

On the other hand, the viscosity and conductivity values were more with EC than SC and WG.

In conclusion, the formulation type may be increase the efficiency of the active ingredient.

In this study EC concentrate was more effective on the efficiency of indoxacarb than SC and WG.